remcos | aa5728008a7a4b1173fc74eb5e41666688baddefbb2d5214d46cd6815646b5f3

Analysis

max time kernel
148s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
08/07/2024, 05:44

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General

Target
GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe
Size 907KB
Sample240708-gfdm8axckb
SHA256 aa5728008a7a4b1173fc74eb5e41666688baddefbb2d5214d46cd6815646b5f3
MD5 a04586c228da78e0da0262392eed4097
SHA1 208be9fa01682e0c85556999eef9496a0cde215a
SHA512 5e908e015caeede046527772f002b61deffacdae1d1aa78d5eb3df05ec8f0349b07b409ff0d3f28e6f4417eeae537ce4e36ae65b695a43556379c77e5e5ebf68
SSDEEP 24576:L3DDd9BNnJ0aQndYRfqJDtOaBoRLJNi+Bfzc:L3DDdD0a0SCJBsR7i+hzc
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

104.250.180.178:7902

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
Adobe.exe
copy_folder
Adobe
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Adobe-OTOIRK
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-771719357-2485960699-3367710044-1000\Control Panel\International\Geo\Nation	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe

Executes dropped EXE 3 IoCs

pid	Process
1364	Adobe.exe
3688	Adobe.exe
4576	Adobe.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-771719357-2485960699-3367710044-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Adobe-OTOIRK = "\"C:\\ProgramData\\Adobe\\Adobe.exe\""	Adobe.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe-OTOIRK = "\"C:\\ProgramData\\Adobe\\Adobe.exe\""	Adobe.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-771719357-2485960699-3367710044-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Adobe-OTOIRK = "\"C:\\ProgramData\\Adobe\\Adobe.exe\""	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Adobe-OTOIRK = "\"C:\\ProgramData\\Adobe\\Adobe.exe\""	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3316 set thread context of 2552	3316	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	85
PID 1364 set thread context of 4576	1364	Adobe.exe	88

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1364	Adobe.exe
1364	Adobe.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1364	Adobe.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3316 wrote to memory of 2552	3316	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	85
PID 3316 wrote to memory of 2552	3316	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	85
PID 3316 wrote to memory of 2552	3316	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	85
PID 3316 wrote to memory of 2552	3316	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	85
PID 3316 wrote to memory of 2552	3316	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	85
PID 3316 wrote to memory of 2552	3316	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	85
PID 3316 wrote to memory of 2552	3316	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	85
PID 3316 wrote to memory of 2552	3316	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	85
PID 3316 wrote to memory of 2552	3316	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	85
PID 3316 wrote to memory of 2552	3316	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	85
PID 3316 wrote to memory of 2552	3316	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	85
PID 3316 wrote to memory of 2552	3316	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	85
PID 2552 wrote to memory of 1364	2552	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	86
PID 2552 wrote to memory of 1364	2552	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	86
PID 2552 wrote to memory of 1364	2552	GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe	86
PID 1364 wrote to memory of 3688	1364	Adobe.exe	87
PID 1364 wrote to memory of 3688	1364	Adobe.exe	87
PID 1364 wrote to memory of 3688	1364	Adobe.exe	87
PID 1364 wrote to memory of 4576	1364	Adobe.exe	88
PID 1364 wrote to memory of 4576	1364	Adobe.exe	88
PID 1364 wrote to memory of 4576	1364	Adobe.exe	88
PID 1364 wrote to memory of 4576	1364	Adobe.exe	88
PID 1364 wrote to memory of 4576	1364	Adobe.exe	88
PID 1364 wrote to memory of 4576	1364	Adobe.exe	88
PID 1364 wrote to memory of 4576	1364	Adobe.exe	88
PID 1364 wrote to memory of 4576	1364	Adobe.exe	88
PID 1364 wrote to memory of 4576	1364	Adobe.exe	88
PID 1364 wrote to memory of 4576	1364	Adobe.exe	88
PID 1364 wrote to memory of 4576	1364	Adobe.exe	88
PID 1364 wrote to memory of 4576	1364	Adobe.exe	88

C:\Users\Admin\AppData\Local\Temp\GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe
"C:\Users\Admin\AppData\Local\Temp\GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3316
- C:\Users\Admin\AppData\Local\Temp\GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe
  "C:\Users\Admin\AppData\Local\Temp\GZD24070024-HBL-931677WIS36-308-1281497576308-128231823326308-12831767177463296332-INV.pdf.scr.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2552
- - C:\ProgramData\Adobe\Adobe.exe
    "C:\ProgramData\Adobe\Adobe.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1364
  - - C:\ProgramData\Adobe\Adobe.exe
      "C:\ProgramData\Adobe\Adobe.exe"
      4⤵
      Executes dropped EXE
      PID:3688
  - - C:\ProgramData\Adobe\Adobe.exe
      "C:\ProgramData\Adobe\Adobe.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      PID:4576

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Adobe.exe

Path C:\ProgramData\Adobe\Adobe.exe
Size 907KB
SHA256 aa5728008a7a4b1173fc74eb5e41666688baddefbb2d5214d46cd6815646b5f3
MD5 a04586c228da78e0da0262392eed4097
SHA1 208be9fa01682e0c85556999eef9496a0cde215a
SHA512 5e908e015caeede046527772f002b61deffacdae1d1aa78d5eb3df05ec8f0349b07b409ff0d3f28e6f4417eeae537ce4e36ae65b695a43556379c77e5e5ebf68
SSDEEP 24576:L3DDd9BNnJ0aQndYRfqJDtOaBoRLJNi+Bfzc:L3DDdD0a0SCJBsR7i+hzc
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1364-37-0x0000000074180000-0x0000000074930000-memory.dmp

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memory/1364-29-0x0000000074180000-0x0000000074930000-memory.dmp

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memory/1364-28-0x000000007418E000-0x000000007418F000-memory.dmp

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memory/2552-10-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2552-27-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2552-15-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2552-13-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/2552-12-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/3316-8-0x00000000056F0000-0x00000000056FC000-memory.dmp

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memory/3316-1-0x00000000005A0000-0x0000000000688000-memory.dmp

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memory/3316-0-0x000000007513E000-0x000000007513F000-memory.dmp

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memory/3316-7-0x00000000053C0000-0x00000000053D8000-memory.dmp

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memory/3316-14-0x0000000075130000-0x00000000758E0000-memory.dmp

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memory/3316-6-0x0000000075130000-0x00000000758E0000-memory.dmp

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memory/3316-5-0x0000000005320000-0x00000000053BC000-memory.dmp

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memory/3316-4-0x0000000005070000-0x000000000507A000-memory.dmp

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memory/3316-3-0x0000000005080000-0x0000000005112000-memory.dmp

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memory/3316-2-0x0000000005700000-0x0000000005CA4000-memory.dmp

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memory/3316-9-0x0000000006970000-0x0000000006A30000-memory.dmp

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memory/4576-42-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4576-45-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4576-35-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4576-38-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4576-39-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4576-40-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4576-36-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4576-43-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4576-33-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4576-46-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4576-44-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4576-47-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4576-48-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4576-49-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/4576-50-0x0000000000400000-0x0000000000482000-memory.dmp

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